TY - JOUR T1 - Note on Certain Coloured Interference Bands and the Colours of Tempered Steel JF - Proceedings of the Royal Society of London. Series A, Containing Papers of a Mathematical and Physical Character (1905-1934) VL - 94 IS - 664 SP - 561 EP - 566 PY - 1918/08/01/ UR - http://dx.doi.org/10.1098/rspa.1918.0040 M3 - doi:10.1098/rspa.1918.0040 AU - Mallock, A. ER -